Effects of vertical fault fracture zones on the spreading of Rayleigh wave and ground motion

LIU Jing-bo; LIU Xiang-qing; ZHAO Dong-dong

doi:10.11883/1001-1455(2008)06-0507-08

Volume 28 Issue 6

Sep. 2014

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LIU Jing-bo, LIU Xiang-qing, ZHAO Dong-dong. Effects of vertical fault fracture zones on the spreading of Rayleigh wave and ground motion[J]. Explosion And Shock Waves, 2008, 28(6): 507-514. doi: 10.11883/1001-1455(2008)06-0507-08

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LIU Jing-bo, LIU Xiang-qing, ZHAO Dong-dong. Effects of vertical fault fracture zones on the spreading of Rayleigh wave and ground motion[J]. Explosion And Shock Waves, 2008, 28(6): 507-514. doi: 10.11883/1001-1455(2008)06-0507-08

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Effects of vertical fault fracture zones on the spreading of Rayleigh wave and ground motion

doi: 10.11883/1001-1455(2008)06-0507-08

1.
Department of Civil Engineering, Tsinghua University, Beijing 100084, China

Publish Date: 2008-11-25

Abstract

Abstract

Dynamic time history analysis of ground motion with vertical fault fracture zones of different widths and shear wave velocities under Rayleigh wave was carried out by using the Rayleigh wave input method based on the viscous-spring artificial boundary. Influence of vertical fault fracture zones with various widths and shear wave velocities on the spreading of Rayleigh wave and ground motion was investigated. The results show variations of fault width and shear wave velocity have little effect in the mediate and far field on the incident side. Peak displacement response of the fault corner and the ground nearby on the incident side enlarges greatly with the increase of fault width or with the decrease of shear wave velocity of the fault. While in the mediate and far field on the other side, peak horizontal and vertical absolute displacements decrease gradually with the increase of fault width or with the decrease of shear wave velocity of the fault, and the horizontal displacement peak has a slighly decrease than that of vertical displacement peak. The results indicate the weak fault fracture zone weakens the Rayleigh wave and with the increase of fault width or with the decrease of shear wave velocity of the fault the weakening effect tends to be enhanced.
- solid mechanics,
- fault fracture zone,
- numerical simulation,
- Rayleigh wave,
- ground motion,
- dynamic time history analysis,
- ratio of displacement amplitude spectrum

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